topic Re: The name 'index_1' hides an outer declaration. in Mathematical Optimization, Discrete-Event Simulation, and OR

The name 'index_1' hides an outer declaration.

SAS5 — Tue, 26 Jul 2016 18:13:29 GMT

Hi,

I have a formulation with more than two indices, SAS produce an error:

for example:

con problem_con{<index_1, index_2> in two_indices}: ...

SAS produced an error and told me:

"The name 'index_1' hides an outer declaration."

What does this mean and how do I get rid of this error?

Thank you!

Re: The name 'index_1' hides an outer declaration.

RobPratt — Tue, 26 Jul 2016 19:00:38 GMT

The message should just be a NOTE and not an ERROR. It means that you have declared index_1 as a parameter and then later used it as a dummy index. The following code yields the same behavior:

proc optmodel;
   num i;
   put ({i in 1..3});
quit;

To avoid the note, either omit the declaration or use a different dummy index.